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Glossary of Terms - C

Alphabetical index of marine painting terms used in the construction, maintenance and repair of boats.

Carbon Footprint

A measure of the impact our greenhouse gas emissions have on the environment, and in particular on climate change. It can be calculated for a particular product, for a manufacturing site or for any activity we undertake. It is a measurement of all the greenhouse gases produced in units of tonnes (or kg) of carbon dioxide equivalent. AkzoNobel has a clear Carbon Policy setting out targets and ambitions to be achieved by 2015 and 2020

Carbon neutral

A commonly accepted terminology for something having net zero emissions of greenhouse gases (for example, an organisation or product). As the organisation or product will typically have caused some greenhouse gas emissions, it is usually necessary to use carbon offsets to achieve neutrality. Carbon offsets are emissions reductions that have been made elsewhere and which are then sold to the entity that seeks to reduce its impact. In order to become carbon neutral it is important to have a very accurate calculation of the amount of greenhouse gas emissions which need to be offset – requiring calculation of a carbon footprint

Catalyst

Hardener, activator, accelerator, curing agent ; a material which starts a reaction but is not actually consumed in that reaction

Cat-eye

Hole shaped like a cat's eye ; cratering

Cathodic Protection

Corrosion prevention by sacrificial anodes, usually a zinc alloy

CFC or Chlorofluorocarbons

These are materials which traditionally had many applications, such as use as propellants in aerosols and as coolants in refrigeration units. Known to deplete the ozone layer in the Earth’s stratosphere , most uses have been severely restricted or banned under international treaties e.g. Montreal protocol

Chalking

Powdering of surface

Checking

Slight V-shaped breaks appear in a paint film due to uneven shrinkage through the cross section of a coat of paint

Chipping

1. Cleaning steel using special hammers 2. Type of paint failure

Chlorinated Rubber

A particular film former used as a binder made by chlorinating natural rubber

Cissing

Fish eyes ; small causer-like depressions in a paint film

Cleaner

Solvent for cleaning paint equipment

Coat Tar Epoxy Paint

Paint made of a combination of coal tar with epoxy resin

Coat Tar Urethane Paint

Paint made of a combination of coal tar with urethane resin

Cobwebbing

Premature drying causing a spider web effect when spraying, (paint dries before it hits the substrate)

Color Retention

Ability to retain original color

Compatibility

Ability to mix with or adhere properly to other components

Copper-free

Copper is used in antifouling paint as a biocide. Copper-free paint does not contain any copper (either as a pigment or as part of the polymer)

Corrosion

Decay ; oxidation, deterioration due to interaction with environments

Coverage Rate

Non technical number that tells you how much area you can paint with a given volume of material

Cracking

Splitting ; disintergration of paint by breaks through film

Cratering

Formation of holes or deep impressions in paint film

Crawling

Shrinking of paint to form uneven surface

Crazing

A pattern of tiny cracks in the surface of a gelcoat

Cross-linking

A particular method by which chemicals unite to form films

Curing

Hardening

Curing Agent

Catalyst, hardener, activator, accelerator, reactor ; a material that reacts with another to convert a liquid coating to a solid coating.

Curtaining

Sagging ; excessive flow of paint on vertical surfaces causing imperfections with thick lower edges in the paint film, not as excessive as runs